The father and brother difficulties/disabilities help Hamilton. They help make him complete unique, unlike the other 20-some lads who drive in F1. Hamilton can be marketed as human. surely, he's not the only celebrity who had a parent working multiple jobs and a disabled sibling.
Damon Hill, who I read about commentating, probably endured more difficulties because he went from riches-to-rags. I think that's tougher than rags-to-riches, which is what Hamy's story is - well, up until he turned sweet thirteen and the "Team of Utmost Integrity" signed him.
As for Hamilton being a hypocrite by cursing his mentor, it's not unexpected. He came from a poor background and now finds himself in position of becoming one of the richest men in Britain, if the marketing men can be believed. As I have said in many other threads before, fame and fortune changes you. Anyone who grew up poor and ended up suddenly rich is not the same guy. That's not a dig at Hamilton. It's just human nature.
It's laughable that so many people instantly bought into the gimmick that Hamy is a really, really, undeniably nice guy. I think Schumacher said (after he nearly chopped his brother into a wall at 300 km/h) that F1 is not a place for happy-go-lucky fellows to sit around enjoying a picnic. Many multiple WDCs are moody, super competitive, self-absorbed loners. Those aren't characteristics normally associated with nice guys!
So many of the rich and famous abandon the people who helped them to the stop. Now that he's in F1 and arguably the biggest thing ever in F1 (according to Stirling Moss), he can just say, well, thanks for the ride. I'm not saying he will, but if you launch an expletive-riddled tirade against a man who made you, then what's to say that he won't walk away?